The leader of the group was behind the 2014 abduction of hundreds of schoolgirls in Chibok KANO, Nigeria: Extremist group Boko Haram on Tuesday claimed responsibility for the abduction of hundreds of school students in northwest Nigeria. “I am Abubakar Shekau and our brothers are behind the kidnapping in Katsina,” said the leader of the group behind the 2014 abduction of hundreds of schoolgirls in Chibok, in a voice message.